[horde] Problem ActiveSync and Serverprofile

[Hendrik Noack]

Am 30.05.2017 06:17 schrieb Vilius Sumskas <vilius at lnk.lt>:
>
> > > > Please don't top post. 
> > > > 
> > > > Quoting Oliver Werner <oliver.werner at hp-gruppe.de>: 
> > > > 
> > > > > the OST File is stored on AppData/Local 
> > > > 
> > > > 
> > > > If I remember correctly, roaming profiles with EAS enabled Outlook 
> > > > is extremely problematic. I can't remember if it was even officially 
> > > > supported or not. I know at one point there were issues with the 
> > > > different instances even having different device ids, which would 
> > > completely break EAS. 
> > > 
> > > OST in AppData/Local should be fine though. 
> > 
> > No this only works if you use local profiles. Outlook stores some kind of ID 
> > in the OST file. The ID is different on every computer. The problem here is, 
> > that Outlook stores the last used ID in your roaming profile. 
> > 
> > So if you use Outlook EAS on PC A it works. (ID A) Then you go to another PC 
> > B without an existing profile it works too, because Outlook creates an new 
> > OST file with a new ID (ID B). If you then go back to PC A your profile gets 
> > synchronized with ID B and you can't access your previous OST file which 
> > uses ID A. 
> > 
> > The most recent version of Outlook in Office 365 doesn't even start 
> > anymore, because it detects an ID mismatch for your local OST file. There 
> > are two ways to cope with it: 
> > 
> > a) don't use roaming profiles 
> > b) delete your OST file when you encounter the problem, it gets recreated 
> > with a new ID and works until you roam again. You could also use a script 
> > that deletes the OST file on every user login. Downside of this is that you 
> > shouldn't have users with big mailboxes or it will take a while to download 
> > everything each and every time a user does a login. 
> > 
> > I have a customer myself who encounters this specific problem and the only 
> > solution there is not to use EAS anymore, because it breaks roaming profiles 
> > with Outlook. I have to go back to IMAP combined with CalDav Synchronizer 
> > which works quite well and is also roaming profile aware. 
> > 
> > As much as I love to use EAS, it's not good for roaming. 
>
> Is there a difference if you use Online mode instead of Cached mode in such case?

I honestly haven't tried that yet. When there is no OST file involved it should work. The problem with online mode is, that it doesn't feel like the ordinary outlook experience people are used to for years. The other downside is that it consumes too much data volume if you are on a mobile connection with a limited data plan, because there is no caching.

- Hendrik

>
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>    Vilius 
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